[librsvg] load: fix compiler warning

[Paolo Borelli <pborelli src gnome org>]

commit a6a4b5d84d2caf45c8e595d8d137fc606bb5bc24
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Jun 16 10:44:23 2018 +0200

    load: fix compiler warning

 librsvg/rsvg-load.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/librsvg/rsvg-load.c b/librsvg/rsvg-load.c
index 0c42eda3..e7463fd0 100644
--- a/librsvg/rsvg-load.c
+++ b/librsvg/rsvg-load.c
@@ -46,6 +46,10 @@ typedef enum {
 G_GNUC_INTERNAL
 RsvgNode *rsvg_load_new_node (const char *element_name, RsvgNode *parent, RsvgPropertyBag *atts);
 
+/* Implemented in rust/src/node.rs */
+G_GNUC_INTERNAL
+void rsvg_node_register_in_defs(RsvgNode *node, RsvgDefs *defs);
+
 struct RsvgLoad {
     RsvgHandle *handle;
     gboolean unlimited_size;